package com.baosu.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.baosu.reggie.common.R;
import com.baosu.reggie.dto.DishDto;
import com.baosu.reggie.entity.Dish;
import com.baosu.reggie.entity.DishFlavor;
import com.baosu.reggie.mapper.DishFlavorMapper;
import com.baosu.reggie.mapper.DishMapper;
import com.baosu.reggie.service.DishFlavorService;
import com.baosu.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.util.List;
import java.util.function.Function;
import java.util.stream.Collectors;

@Service
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    private DishFlavorService dishFlavorService;

    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        //保存菜品的基本信息到菜品表dish
        this.save(dishDto);

        //获取菜品id
        Long dishId = dishDto.getId();
        //获取菜品口味
        List<DishFlavor> flavors = dishDto.getFlavors();

        //方式1：foreach
        /*for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishId);
            dishFlavorService.save(flavor);
        }*/

        //方式2：stream流
        //循环设置口味表的id
        flavors = flavors.stream().map(new Function<DishFlavor, DishFlavor>() {
            @Override
            public DishFlavor apply(DishFlavor item) {
                item.setDishId(dishId);
                return item;
            }
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);

    }

    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //根据id查询菜品基本信息
        Dish dish = this.getById(id);

        //先将基本信息拷贝
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前id的口味信息
        LambdaQueryWrapper<DishFlavor> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> list = dishFlavorService.list(wrapper);

        //赋值口味信息
        dishDto.setFlavors(list);

        return dishDto;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);
    }

    @Override
    public void deleteWithFlavor(List<Long> ids) {
        //删除菜品表
        this.removeByIds(ids);

        //删除菜品口味表
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.in(DishFlavor::getDishId, ids);
        dishFlavorService.remove(queryWrapper);

    }


}
